Accordingly, a deficiency in either of these factors may increase the chance of an identity crisis or confusion.

A deficiency of B-lymphocytes can increase susceptibility to bacterial infections like pneumonia and to most disease-causing viruses, such as infectious hepatitis.

A deficiency can increase the risk of infection and interfere with production of T-lymphocytes and antibodies.

These deficiencies increase transportation costs, which in turn drive up the cost of every product we buy and make American products less attractive on the world market.

His deficiencies as a fielder have increased after he missed all but 14 games last year because of surgery on his right knee.

On Antarctica the deficiency increased by 75%.

In addition, moderate deficiency of thiamine may increase rates of depression, dementia, falls, and fractures in old age.

Severe deficiency of copper in pregnant mothers increases the risk of health problems in their fetuses and infants.

Doctors should also make sure that older people get enough vitamin D, because deficiencies greatly increase fracture risk, Dr. McGowan said.

Make sure children consume adequate amounts of iron, calcium and protein; deficiencies in these nutrients increase the absorption of lead.